Preparation for automatically sealing punctures in pneumatic tires.



GEORGE HERBERT PRICE, OF QUEENsTowR, CAPE COLONY.

No Drawing.

To all whom it mag/concern:

Be it known that I, GEORGE HERBERT PRICE, a subject of the King of Great Britain, residing at Queenstown, in the Province of the Cape of Good Hope, South Africa, have invented a new or Improved and Useful Preparation for Automatically Sealing Punctures in Pneumatic Tires, of which the following is a specification.

This invention relates to means for auto- -matically sealing accidentally produced punctures in the inner india rubber tubes of pneumatic tires of cycles and other wheeled road vehicles and the said invention consists in a liquid preparation for insertion in said inner tubes.

The preparation consists of the milk or sap of plants of the genus Euphoo'bz'a, such for instance as Eupkorbz'a pulmlnata, (Marloth) or of other plants the milk or sap of which possesses rubber qualities, together with a substance,-such as glycerin or ammonium hydrate, which prevents coagulation of the milk or sap, and usually also a preservative such as formalin.

It has been found in practice that a preparation well suited for the aforesaid V urpose may be produced by use of the a oresaid matters in the following pro ortions, viz: one quart of the aforesaid mi k or sap and one tablespoonful of glycerin and two drops *of formalin or insteaiof, the said glycerin three parts of ammonia to every hundred parts of the said milk or sap. In making the said preparation the glycerin or ammonia is thoroughly mixed with the said milk or sap at the time it is tapped and the Specification of Letters Patent. Patented J une 17 1913. Application filed August 14, 1911. Serial No. 643,947.

formalin is added within a week after. The formalin may be added to the milk or sap at the same time as the glycerin or ammonia but a better result is obtained by adding the glycerin or ammonia to and thoroughly mixing it with the milk or sap before adding the formalin. The minimum quantity of the said preparation required for an inner tube eighty inches in length and two inches in diameter is three tablespoonfuls and for inner tubes of other size the minimum quantity of the preparation required is in a like ratio.

In using the preparation it is inserted in the inner tube which is afterward inflated.

I claim 1. A preparation comprising the milk or sap of plants of the genus Euphorbia and glycerin.

2. A preparation comprising the milk or sap of E uphorbz'a puZ-vinam and glycerin.

3. A preparation comprising the milk or sap of plants of the genus Euphorbz'a, glycer1n and a preservative.

4. A preparation comprising the milk or sap of Euphm'bz'a pulm'nata, glycerin and a preservative.

5. A preparation comprising the milk or sap of plants of the genus Euphorbz'a, glycerin and formalin.

6. A preparation comprising the milk or sap of Euphorbz'a p'ul-vinata, glycerin and formalin. l

GEORGE HERBERT PRICE.

-Witnesses:

PATRICK MCMAHON, GEO. SMITH LYMING. 

